El género Bostryx en la región centro-oeste de la Argentina: descripción anatómica y distribucional de cuatro de sus especies más australes (Gastropoda, Bulimulidae)

El género Bostryx Troschel, 1847 es endémico de Sudamérica, extendiéndose desde Ecuador hasta Chile y Argentina. Las especies argentinas más australes habitan en las provincias de San Luis, San Juan y Mendoza, especialmente en la precordillera y cordillera Andina y las Sierras Pampeanas, fueron examinadas. Se describe por primera vez la anatomía de Bostryx pastorei (Holmberg, 1912), Bostryx reedi (Parodiz, 1947) y Bostryx strobeli (Parodiz, 1956). Bostryx cordillerae (Strobel, 1874) es redescripta en conchilla y anatomía con nuevos datos morfológicos. Las principales diferencias entre las especies examinadas están basadas en caracteres de conchilla. La distribución deBostryx mendozanus (Strobel, 1874) y Bostryx cuyanus (Pfeiffer, 1867), otras especies encontradas en esta región, es también discutida.

PALABRAS-CLAVE
Stylommatophora; Precordillera; Sierras Pampeanas; sistemática

Autoría

María José Miranda

Instituto de Biodiversidad Neotropical, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Tucumán (UNT), Facultad de Ciencias Naturales, Miguel Lillo 205, 4000 Tucumán, Argentina. (mirandamjo@hotmail.com)Universidad Nacional de TucumánArgentinaTucumán, Argentina Instituto de Biodiversidad Neotropical, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Tucumán (UNT), Facultad de Ciencias Naturales, Miguel Lillo 205, 4000 Tucumán, Argentina. (mirandamjo@hotmail.com)

SCIMAGO INSTITUTIONS RANKINGS

Figuras | Tablas

Figuras (11)
Tablas (2)

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Figs 1-5
Measurements of the shell: 1, 2, linear measurements; 3, total shell perimeter; 4, spire and body whorl perimeter; 5, aperture perimeter.

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Fig. 6
Geographical distribution of the southernmost Argentinian species of the genus Bostryx (Gastropoda, Bulimulidae).

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Figs 7-8
Bostryx reedi (Parodiz, 1947). 7, holotype (MACN 10001) in ventral, dorsal and laterals view; 8, size and shape variation of shells (MCNL 1116) (scale bar: 1 cm).

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Figs 9-11
Bostryx reedi (Parodiz, 1947). 9, general view of the protoconch and 3 first whorls (scale bar: 200 µm); 10, 11, detail of sculpture of protoconch (scale bar: 100 and 20 µm, respectively).

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Figs 12-14
Bostryx reedi (Parodiz, 1947). 12, View of dissected reproductive system; 13, phallic complex without penial sheat; 14, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

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Figs 15-17
Bostryx pastorei (Holmberg, 1912). Shells in ventral, dorsal and lateral view: 15, lectotype (MACN 1517); 16, IFML 15573; 17, MACN 9917. (Scale bar: 5 mm).

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Figs 18, 19.
Bostryx pastorei (Holmberg, 1912). 18, View of dissected reproductive system; 19, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

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Figs 20, 21.
Bostryx strobeli (Parodiz, 1956). 20, Holotype (MACN 9916) in ventral, dorsal and laterals view; 21, size and shape variation of shells (MLP 11010, MACN 27283, MLP 11018) (scale bar: 1 cm).

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Figs 22, 23.
Bostryx strobeli (Parodiz, 1956). 22, View of reproductive system dissected out; 23, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor mucle of penial sheath; S, spermoviduct; V, Vagina; VD, vas deferens).

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Figs 24-27
Bostryx cordillerae (Strobel, 1874). 24, 25, Size and shape variation of shells (IFML 15580, MACN 12114) (scale bar: 1 cm); 26, general view of protoconch (scale bar: 100 μm); 27, detail of protoconch's sculpture (scale bar: 20 μm).

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Figs 28, 29.
Bostryx cordillerae (Strobel, 1874). 28, View of reproductive system dissected out; 29, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; V, vagina; VD, vas deferens).

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Tab. I
Shell measurements (ad, shell apertural diameter; ah, shell apertural height; bwh, body whorl height; masd, major diameter of the shell; misd, minor diameter; psl, parietal space length; pwd, penultimate whorl major diameter; pwh, penultimate whorl height; sh, spire height; tsh, shell height).

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Tab. II
Shell measurements (n, number of measured specimens; SD, standard deviation; Min., minimum; Max., maximum; Mean, average).

Figs 1-5 Measurements of the shell: 1, 2, linear measurements; 3, total shell perimeter; 4, spire and body whorl perimeter; 5, aperture perimeter.

Fig. 6 Geographical distribution of the southernmost Argentinian species of the genus Bostryx (Gastropoda, Bulimulidae).

Figs 7-8 Bostryx reedi (Parodiz, 1947). 7, holotype (MACN 10001) in ventral, dorsal and laterals view; 8, size and shape variation of shells (MCNL 1116) (scale bar: 1 cm).

Figs 9-11 Bostryx reedi (Parodiz, 1947). 9, general view of the protoconch and 3 first whorls (scale bar: 200 µm); 10, 11, detail of sculpture of protoconch (scale bar: 100 and 20 µm, respectively).

Figs 12-14 Bostryx reedi (Parodiz, 1947). 12, View of dissected reproductive system; 13, phallic complex without penial sheat; 14, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

Figs 15-17 Bostryx pastorei (Holmberg, 1912). Shells in ventral, dorsal and lateral view: 15, lectotype (MACN 1517); 16, IFML 15573; 17, MACN 9917. (Scale bar: 5 mm).

Figs 18, 19. Bostryx pastorei (Holmberg, 1912). 18, View of dissected reproductive system; 19, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; SV, seminal vesicle; V, vagina; VD, vas deferens).

Figs 20, 21. Bostryx strobeli (Parodiz, 1956). 20, Holotype (MACN 9916) in ventral, dorsal and laterals view; 21, size and shape variation of shells (MLP 11010, MACN 27283, MLP 11018) (scale bar: 1 cm).

Figs 22, 23. Bostryx strobeli (Parodiz, 1956). 22, View of reproductive system dissected out; 23, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor mucle of penial sheath; S, spermoviduct; V, Vagina; VD, vas deferens).

Figs 24-27 Bostryx cordillerae (Strobel, 1874). 24, 25, Size and shape variation of shells (IFML 15580, MACN 12114) (scale bar: 1 cm); 26, general view of protoconch (scale bar: 100 μm); 27, detail of protoconch's sculpture (scale bar: 20 μm).

Figs 28, 29. Bostryx cordillerae (Strobel, 1874). 28, View of reproductive system dissected out; 29, phallic complex inner wall (scale bar: 5 mm) (A, atrium; AG, albumen gland; BC, bursa copulatrix; BCD, bursa copulatrix duct; Ep, epiphallus; F, flagellum; GO, genital opening; HD, hermaphroditic duct; P, penis; PG, penial gland; Pr, prostate; PS, penial sheath; PRM, retractor muscle; RMS, retractor muscle of penial sheath; S, spermoviduct; V, vagina; VD, vas deferens).

Tab. I Shell measurements (ad, shell apertural diameter; ah, shell apertural height; bwh, body whorl height; masd, major diameter of the shell; misd, minor diameter; psl, parietal space length; pwd, penultimate whorl major diameter; pwh, penultimate whorl height; sh, spire height; tsh, shell height).

Tab. II Shell measurements (n, number of measured specimens; SD, standard deviation; Min., minimum; Max., maximum; Mean, average).

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El género Bostryx en la región centro-oeste de la Argentina: descripción anatómica y distribucional de cuatro de sus especies más australes (Gastropoda, Bulimulidae)

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